#include <math.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <limits.h>
#include <stdbool.h>

unsigned long long int sumOfGroup(long int k) {
  /*  int l=k-1;
    long int sum=0;
    long int i=(l*k)+1;
    for(int j=0;j<k;j++)
    {
        sum+=i;
        i+=2;
    }*/
    return k*k*k;
    // Return the sum of the elements of the k'th group.
}

int main() {
    int k; 
    scanf("%i", &k);
    unsigned long long int answer = sumOfGroup(k);
    printf("%llu\n", answer);
    return 0;
}